Truck-bolster



E. C. WASHBURN.

TRUCK BOLSTER.

APPLICATION nLEuJuNE1a.`l92o.

Patented Feb. 8, 1921.

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TRUCK BOL'STER.

APPLlcATloN FILED JUNE le., 1920.

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EDWIN C. W'ASHBURN, 0F ENGLEWOOD, NEW JERSEY.

TRUGK-BOLSTER.

Application niet?. June' 1S,

To all whom 'it may concern.'

Be it lrnown that l, EDWIN C. l/Vnsnsunn, a citizen of the United States, residing at Englewood, in the county of Bergen and State of New Jersey, have invented certain new and useful improvements in Truclrolsters; and l do hereby declare the fol-.louYK ing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to. make and use the same.

My present invention provides an irnproved truck bolster and includes also animproved process of making the same. il. novel feature of the present invention consists in first independently forming the compression and tension members of the bolster and in thereafter rigidly and permanently uniting the said members by casting the elements directly against the same.

The invention is illustrated in the accompanying drawings, wherein lilre characters indicate like parts throughout the several views.

Referring to the drawings, wherein like characters indicate like parts throughout the several views,

Figure 1 shows the improved bolster and certain parts of a truck frame partly in elevation and partly in vertical section;

2 is a plan view of the bolster and part of the truck frame;

Fig. 3 shows a part of a truck frame in side elevation and the bolster in end elevation; Y

Fig. 4 is a section on the line l1-el: of Figs. 1 and;

Fig. 5 is a perspective view showing the` center casting or strut of the bolster;

Fig. 6 is a perspective view showing the cast so-called tie-plate; A

Fig. 7 is a fragmentary perspective showing a portion of the compression member of the bolster and the center plate cast thereon; and Y Fig. 8 is a perspective view of one of the cast endv caps of the bolster.

The numerals 9 and 10., indicate, respectively, the compression and tension members of the bolster.- The compression or top member 9 is a rolled steel channel, while'the lower r tensionmember 10 is preferably a flat rolled steel bar. At" their central or intermediate portions, the compression and tension members 9 and 10 are spaced by a cast independently formed strut 11 that is formed with a central sleeve 12 and, at its Specification of Letters Patent.

resented ree. s, 1921.

ieee.Y semi No. 389,995. i

lowerA portion, is made to fit and rest uponV member 9. Also, this center bearing plate is formed with a sleeve portion le, that alines with the sleeve 12 of the strut and cooperates therewith to form a pintle pin seat. ri`his sleeve 111 is castthrough a per-` foration in the central portion of the web of the member 9. The strut and the com pression member are thus united by the casting of the center bearing plate, as stated.

By reference particularly to Figs. i and 5, it will be noted thatthe lower portion of the center plate 13 is cast into grooves and around flanges of the strut 11, so that it becomes positively interlocked thereto.

To rigidly unite the lower portion of the strut 11 to the central portion of the tension member or bar 10,`a flanged tie-plate 15 (see particularly Figs. e and 6) is cast against the said member 150 and over the bottom flange of said strut, while the said parts are in their proper relative positions.

Preferably, this tie-plate 15 and the tension bar or member 10 are `perforated to extend the pintle seat.

' Ey reference particularly to Figs. 1 and 8, it will be noted that the so-called bolster and caps 16 are hollow rectangular strucl tures formed or cast independently of the other members of the bolster and provided with large rectangular cavities 17, in which the ends of the compression and tension members 9 and 10 are adapted to be inserted with a large amount of clearance. ln the process of making the bolster, the ends of said members 9 and 10 are inserted and properly positioned within the cavities 17 and then the said parts are rigidly and per- -manently united by casting metal 18`into the said seats so as to fill the same and form welded or semi-welded joints with the ends of said members 9 and 10. Thus, the ends of the compression and tension members of the bolster are very rigidly united. ln their sides, the bolster end caps 16 are lformed with guide ribs i9 forcoperation with the truck holsters. Attention may be here called et i ico

to the fact that in Fig. 7, the center bearing plate 13 is, for clearness, shown as disasseciated :trom the strut 11, Whereas, as a matter of fact, after it has been cast, it will alvvaye be fast to the previously formed strut 11.

By reference to the sectional portion at the left in Fig. 1, it Will be noted that the ends orl the compression and tension mei bers 9 and lO are perforated so as to permit the metal 18 to run therethrough and thus increase the strengthofV the bond.

So far as the present invention is concerned, the truck frame which carries the novel bolster described may be oi any approved construction, but as illustrated, is of the form disclosed and claimed in my companion application filed ol even date herewith and entitled cTruck side frame and process of producing the same. Referring briefly to the parts thereof, the numeral 2O indicates the bolster columns, the numerals 21, 22 and 23, respectively, the tension and compression members and bottom tiebars, the numeral 24 indicates a cross transom, and the numeral 25 the bolster-supporting springs.

The invention above described eliminates use of bolts and rivets in the bolster and thereby obtains a maximum of strength With a minimum of' Weight and a result oi' economy in the use of metal. lt also reduces, to a minimum, the amount of casting required, on the holsters, and'permits the use, in the compression and tension members7 of commercial rolled steel, `which is not only cheaper, but better for use in truck bolster than cast metal.

What I claim is:

1. A truck bolster having in combination a compression member, a tension member, a case inclosing the ends of said members and a cast metal filling in said casing which forms a rigid structure with the said ends and easing. f

2. A truck bolster having in combination a compression member, a tension member, a casing inclosing the ends or said members having openings therein, and a east metal filling in said casing which fills saidL openings andforms a rigid` structure with sait. ends and casing. Y

A truck ,bolster comprising independently formed compression and tension members and a strut formedV independentlyV thereof, said compression and tension members and strut being rigidly and perma-v nently united by metal cast tast thereto.

l. A, truck bolster comprising independ ently formed compression and tension members and a strut formed independently thereof, and an independently formed center bearing plate cast fast to said compression member and strut.

Loomis 5. A truck bolster comprising independently formed compression and tension members and a strut formed independently thereof, an independently formed center bearing plate cast fast to said compression member and strut, and a tie-plate cast ast to said tension member and to said strut.

6. A. truck bolster comprising independently formed compression and tension members, a strut and bolster end caps, all independently formed but rigidly and permanently united by metal subsequently cast fast thereto.

7. A truck bolster comprising independ- Jitly l'ormed compression and tension mem bers, a strut and bolster end caps, all independently formed but rigidly and permanently united by metal subsequently cast iast thereto, and including` a center bearing plate cast to ormagainst and rigidlv unite said strut and Vcompression member.

8. The process of making truck holsters, which consists in iirst independently forming the compression and tension members thereof and a strut, and thereafter rigidlyy and permanently uniting said elements by casting metal fast thereto.

9. The process of making truck holsters, which consists first in independently forming compression and tension members, a strut and bolster end caps, and thereafter properly assembling said elements and rigidly and permanently uniting the same by casting metal fast-thereto. Y

10. rl`he process of making truck holsters, in independently forming compression and tension members and a strut, in assembling said elements, and in rigidly uniting said strut to said compression member by casting a center bearing plate fast thereto in the forming of said plate.

11. A bolster comprising tension and; compression members having a strut cast through its compression member.

12. A bolster having a center plate cast around its compression member'.

i3. A bolster having a center plate cast through and around its compression member.

le. A bolster having upper and lower longitudinal members having a strut cast into interlocking engagement therewith.

15. A bolster having a separately formed strut and cooperating tension and compression elements cast into interlocking engagement With the strut and uniting the same thereto.

16. A bolster having an end casting chambered to receive the bolster member and secured thereto by a liller cast therein.

ln testimony whereof I aliiX my signature.

EDWIN C. WASHBUR-N. 

